Rust advisories / ordnung
Vulnerability HighRUSTSEC-2020-0038 · ordnung
RUSTSEC-2020-0038: Memory safety issues in `compact::Vec`
Short answerA security vulnerability in the ordnung crate: Memory safety issues in `compact::Vec`. High severity (CVSS 7.5). No fixed version: replace the crate or remove the affected code path.
| Crate | ordnung |
|---|---|
| Type | Vulnerability |
| Affected versions | Every version. |
| Fixed in | none |
| Severity | High, CVSS 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Published | 2020-09-03 |
| Last changed | 2023-11-08 |
| Also known as | CVE-2020-35890, CVE-2020-35891, GHSA-4wj3-p7hj-cvx8, GHSA-qrwc-jxf5-g8x6 |
What to do
- Find who pulls it in:
cargo tree -i ordnung. - Avoid the affected API, or replace the crate.
Details from the advisory
compact::Vec contains multiple memory safety issues.
1. It mishandles large capacity and causes out-of-bound access in 32-bit / allocator layout mismatch in 64-bit. 2. remove() is not panic-safe and causes double-free when an index larger than the length is provided.
References
- Package: crates.io/crates/ordnung
- Advisory: rustsec.org/advisories/RUSTSEC-2020-0038.html
- Report: github.com/maciejhirsz/ordnung/issues/8
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
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